Noritz N-0751M-OD Installation Manual

Also see for N-0751M-OD: Service manual Installation manual Owner's guide

Contents

19Connecting the pump control wire1. Leave enough slack so that the pump controlwires will stay connected if the unit is removedfrom the wall.2. Remove the front cover of the heater (4 screws).3. Cut off the connector at the end of the pumpcontrol wires.4. Wire the pump control wires through the wiringthroughway and connect them to the wiring insidethe pump (this will be the power supply for the pump,do not also connect 120VAC to the pump).If a large pump is being used (greater than 85W) usethe voltage from these wires as the signal to close anormally open relay through which 120VAC will besupplied directly from a wall circuit to the pump.5. Replace the front cover.Pump Wiring * This feature is not available when using the Quick Con-nect Multi System feature.Relay connection with larger pumps (>85 W)1. Locate and prepare the pump control wires as described above.2. Choose a suitable installation location for the relay where it will be protected from moisture.3. Connect the pump control wires from the heater to the signal input on the relay.4. Cut one of the electrical supply leads and wire it across the open terminals of the relay.5. Secure all connections and replace the front cover of the heater.Circulation Pump120VACRelay (ex. Omron G7L2ABUBJCBAC120)Connect to Pump ControlWires in Unit 0124PUMPCrimping TerminalWiringThroughway Supplies Power forCirculating Pump(Use a Relay forLarger Pumps)Pump ControlWire Tag